2016 LEXUS RX450H battery

572 7-2. Steps to take in an emergency
RX450h_U_OM0E013U WA R N I N G ■
Avoiding 12-volt battery fires or explosions
Observe the following precautions to preven t accidentally igniting the flammable gas
that may be emitted from the 12-volt battery: ●
Make sure each jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any other than the intended terminal.●
Do not allow the other end of the jumper cable connected to the “+” terminal to come
into contact with any other parts or metal surfaces in the area, such as brackets or
unpainted metal. ●
Do not allow the + and - clamps of the jump er cables to come in to contact with each
other. ●
Do not smoke, use matches, cigarette lighters or allow open flame near the 12-volt
battery. ■
12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte, while related
parts contain lead and lead compounds. Ob serve the following precautions when han-
dling the 12-volt battery: ●
When working with the 12-volt battery, alwa ys wear safety glasses and take care not
to allow any battery fluids (acid) to come in to contact with skin, clothing or the vehicle
body. ●
Do not lean over the 12-volt battery. ●
In the event that battery fluid comes into contact with the skin or eyes, immediately
wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received. ●
Always wash your hands after handling the 12-volt battery support, terminals, and
other battery-related parts. ●
Do not allow children near the 12-volt battery. ■
After recharging the 12-volt battery
Have the 12-volt battery inspected at your Lexus dealer as soon as possible.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt battery to
emit a malodorous gas, which may be de trimental to the health of passengers.■
When exchanging the 12-volt battery
After exchanging, securely attach the exha ust hose and exhaust hole plug to the
exhaust hole of the exchanged 12-volt battery. If not properly installed, gases (hydro-
gen) may leak into the vehicle interior, and th ere is the possible danger of the gas ignit-
ing and exploding.

5737-2. Steps to take in an emergency
7
When trouble arises
RX450h_U_OM0E013U NOTICE ■
When handling jumper cables
When connecting the jumper cables, ensure th at they do not become entangled in the
cooling fans or belt. ■
To prevent damaging the vehicle
The exclusive jump starting terminal is to be used when charging the 12-volt battery
from another vehicle in an emergency. It ca nnot be used to jump start another vehicle.

5858-1. Specifications
8
Vehicle specifications
RX450h_U_OM0E013U * : The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up the engine and turn off the hybrid system, wait more than 5 minutes, and
check the oil level on the dipstick.Hybrid battery (traction battery) Ty p e Nickel-Metal hydride battery
Vo l t a g e 9.6 V/m o d u l e
Capacity 6.5 Ah (3HR)
Quantity 30 modules
Overall voltage 288 V
Lubrication system Oil capacity
(Drain and refill — reference
* )
With filter 
Vehicles with towing package
5.8 qt. (5.5 L, 4.8 Imp. qt.) 
Vehicles without towing package
5.7 qt. (5.4 L, 4.8 Imp. qt.)
Without filter 5.6 qt. (5.3 L, 4.7 Imp. qt.)

5878-1. Specifications
8
Vehicle specifications
RX450h_U_OM0E013U * : The coolant capacity is a reference quantity.
If replacement is necessary, contact your Lexus dealer.Cooling system Capacity
* 
Gasoline engine
10.7 qt. (10.1 L, 8.9 Imp. qt.) 
Power control unit
2.0 qt. (1.9 L, 1.7 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and non-
borate coolant with long-life hybrid organic
acid technology
Do not use plain water alone.
Ignition system (spark plug) Make DENSO FK20HBR8
Gap 0.03 in. (0.8 mm)
NOTICE ■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system 12-volt battery
Open voltage at 68  F (20  C): 12.6 V or higher: Fully charged
12.2 — 12.4 V: Half charged
12.0 V or lower: Discharged
(Voltage is checked 20 minutes after the hybrid
system and all lights are turned off.)
Charging rates 5 A max.

602 8-1. Specifications
RX450h_U_OM0E013U Production options weight The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously con-
sidered in curb weight or accessory weight, including
heavy duty brakes, ride levelers, roof rack, heavy duty
12-volt battery, and special trim
Rim A metal support for a tire or a tire and tube assembly
upon which the tire beads are seated
Rim diameter
(Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer’s designation for a rim by
style or code
Rim width Nominal distance between rim flanges
Vehicle capacity weight
(Total load capacity) The rated cargo and luggage load plus 150 lb. (68 kg)
times the vehicle’s designated seating capacity
Vehicle maximum load on
the tire The load on an individual tire that is determined by dis-
tributing to each axle its share of the maximum loaded
vehicle weight, and dividing by two
Vehicle normal load on the
tire The load on an individual tire that is determined by dis-
tributing to each axle its sh are of curb weight, accessory
weight, and normal occupant weight (distributed in
accordance with Table 1
* below), and dividing by two
We a t h e r s i d e The surface area of the rim not covered by the inflated
tire
Bead The part of the tire that is made of steel wires, wrapped
or reinforced by ply cords and that is shaped to fit the
rimTire related term Meaning

618 8-2. Customization
RX450h_U_OM0E013U ■
Seat belt reminder (  P. 5 3 8 )■
Vehicle customization ●
When the smart access system with push-but ton start is off, the entry unlock function
cannot be customized. ●
When the doors remain closed after unlocking the doors and the timer activated auto-
matic door lock function activates, signals will be generated in accordance with the
operation buzzer volume and operational si gnal (Emergency flashers) function set-
tings. ●
Some settings can be changed using a switch or the audio system screen. If a setting is
changed using a switch, the changed setting will not be reflected on the audio system
screen until the power switch is turned off and then to ON mode. Function Default setting Customized setting
Vehicle speed linked seat belt
reminder buzzer On Off — O
WA R N I N G ■
Cautions during customization
As the hybrid system needs to be operating during customization, ensure that the vehi-
cle is parked in a place with adequate vent ilation. In a closed area such as a garage,
exhaust gases including harmful carbon mo noxide (CO) may collect and enter the
vehicle. This may lead to death or a serious health hazard.
NOTICE ■
During customization
To prevent 12-volt battery discharge, ensure that the hybrid syst em is operating while
customizing features. 1 2

619
RX450h_U_OM0E013U 8
Vehicle specifications 8-3. Initialization
Items to initialize The following items must be initialized for normal system operation after such
cases as the 12-volt battery being re connected, or maintenance being per-
formed on the vehicle. Item When to initialize Reference
Message indicating mainte-
nance is required (U.S.A. only) • After the maintenance is per-
formed P. 4 6 6
Tire pressure warning system • When changing the tire inflation
pressure by changing traveling
speed
• When changing the tire size
• When rotating the tires P. 4 8 9
Oil maintenance • After the maintenance is per-
formed P. 4 7 8
Power back door • After reconnecting or changing
the 12-volt battery P. 1 5 0

636
RX450h_U_OM0E013U What to do if... (Troubleshooting)
What to do if... (Troubleshooting) ●
If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. (  P. 1 3 3 )●
If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. (  P. 1 3 5 )●
Is the electronic key battery weak or depleted? (  P. 5 0 6 )●
Is the power switch in ON mode?
When locking the doors, turn the power switch off. (  P. 2 3 3 )●
Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person. ●
The function may not operate properly du e to the condition of the radio wave.
(  P. 1 6 0 )
●
Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
(  P. 1 3 9 )If you have a problem, check the following before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened